Monitors the average wall thickness of pipes and containers
The ClampOn Corrosion Erosion Monitor (CEM) measures wall thickness loss by a unique technique that uses clamp-on sensors. A number of transducers measure corrosion-erosion by transmitting ultrasonic signals that spread through pipe material. The dispersive characteristics of a group of guided acoustic waves, called Lamb modes, are exploited to indicate a mean change in wall thickness relative to reference values acquired during the installation of the CEM system. By using ClampOn acoustic transducers, no drilling or welding is required, which means there is no loss of production.
With the CEM system being permanently installed, the measurements are guaranteed to be repeated regularly and in precisely the same way. This essentially eliminates the weaknesses of manual ultrasonic thickness gauging. Wall thickness trends are also produced automatically and can be examined in real time.